A Model Is A Good Model If

With Genetic Engineering, We Will Be Able To Increase The Complexity Of Our Dna, And Improve The Human Race. But It Will Be A Slow Process, Because One Will Have To Wait About 18 Years To See The Effect Of Changes To The Genetic Code.

I Put A Lot Of Effort Into Writing 'a Briefer History' At A Time When I Was Critically Ill With Pneumonia Because I Think That It's Important For Scientists To Explain Their Work, Particularly In Cosmology. This Now Answers Many Questions Once Asked Of Religion.

When I Was First Diagnosed With Als, I Was Given Two Years To Live. Now 45 Years Later, I Am Doing Pretty Well.

Never Put Off The Work Till Tomorrow What You Can Put Off Today.

I Want To Encourage Public Interest In Space. I Have Never Let My Condition Stop Me. You Only Live Once.